EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 3856-1 testing. The principle of the AAS (atomic absorption spectrometric) method consists in aspiration of the test solution into an acetylene/air flame.
Measurement of the absorption of the selected spectral line emitted by a lead hollow cathode or lead discharge lamp in the 283,3 nm region. The principle of the dithizone method consists in the extraction of lead from the test solution with a solution of dithizone in 1,1,1-trichloroethane.
ISO 3856-1 is an International Standard that specifies two methods for the determination of lead content in paints and varnishes:
The purpose of this standard is to provide a reliable and accurate method for quantifying the content of soluble lead in paints and varnishes, as lead is a toxic metal that can pose health risks if swallowed or inhaled.
The flame atomic absorption spectrometric method involves using a flame to vaporize the sample and then analyzing the resulting vapor using an atomic absorption spectrophotometer. This method provides a direct measurement of the amount of lead present in the sample.
The dithizone spectrophotometric method involves the use of dithizone, a complexing agent that reacts with lead to form a colored complex. The intensity of the color is then measured using a spectrophotometer, which allows the lead content in the sample to be determined.
Both methods require sample preparation by dissolving the paint or varnish in a suitable solvent. The standard specifies suitable solvents to be used for different types of paints and varnishes.
ISO 3856-1 also specifies the precision and accuracy of methods as well as the calibration of instruments used for analysis. The standard provides guidelines for validation of methods, including determination of limit of detection and limit of quantification.
By following the procedures outlined in ISO 3856-1, paint and varnish manufacturers, testing laboratories and regulatory agencies can ensure that the lead content in paints and varnishes is measured accurately and reliably and that products containing excessive lead are not released into the environment.
EUROLAB assists manufacturers with ISO 3856-1 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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